Riveting device



FebZZ WZS H. JUNKERS RIVETING' DEVICE 2 sheets-sheet 1 Filed June 28, 1920 n h n u 4 a w i with sheet metal.

Patented Feb. 27', 1923.

UhlWEW STATES PATENT OFFICE.

, RIVEI'IN'G DEVICE.

Application filed June 28,

To all whom itmag concern:

Be it known that I, Huoo JUNKERS, a citizen of the German Empire, residing at Dessau, Germany, have invented certain new and useful Improvements in Riveting Devices (for which I have filed application in Germany, dated Oct 1, 1918), of which the following is a specification.

My invention relates to riveting devices and more especially to a device for riveting long hollow work pieces such as tubes and the like. Up till now the riveting of such .work pieces, especially such of small crosssectional dimensions, was very difficult and wearisome inasmuch as fetching each sin le rivet, introducing same in the rivet ho e, holding it during the riveting operation and so on required numerous wearlsome manual operations. By introducing the rivet from outside and forming the closing head from inside the work piece a considerable loss of time was added to the unreliability characterizing the internal riveting.

There are other devices, in which the tube to be riveted is placed over a stationary mandrel, the rivets being advanced to the riveting point within this mandrel and there introduced into the rivet hole by means of a lifting device, whereupon the forming of the closing head is efi'ected from the outside. However in order to be able to use such-machines the work piece must allow of being easily shifted on the mandrel whereas they are useless in those cases, where the work piece cannot be displaced with ease as is the case for instance in the construction of large frames, composed of tubular elements or in covering or lining such frames The riveting device according to the present invention allows to introduce into .the work piece, no matter whether it can be easily handled or not, a greater number of rivets at a time, said rivets'being then inserted,'one after theother in the respective rivet holes. "To this end the novel riveting device isconstructed substantially as follows: A body whose cross section is adapted to the free cross section of the work piece, and which can be freely moved within the latter, receives a greater number of stored rivets in a sort of magazine. The said body further carries devices for advancing the rivets, for inserting them in the rivet holes and for carrying an abutment or anvil underneath the rivet insert=v 1920. Serial No. 392,593.

ed in the hole, tlfis being effected by means I of a long rod or sleeve suitably guided within a collar or socket at the end of the work iece and which can be adjusted and fixed if required. In order to permit the devices provided within the body for advancing the I rivets, for inserting the same in the rivet holes, for adjusting the riveting abutment and the like to be easily operated from the outside, they are moved by means of longi' tudinally movable or rotatable transmitting members, which can be operated from the free end of the sleeve carrying the body.

With the sleeve serving for shifting the riveting device arrangements are preferably connected which serve for carrying and adjusting the rivet exactly below the appropriate rivet hole in order to facilitate the accelerate the insertion of the rivets.

Further details of the invention may be guessed from the following description and from the drawings aflixed thereto and forming part thereof, wherein several embodiments of my invention are illustrated.

In the drawings- Fig. 1 is a longitudinal section of the riveting device and the work piece, in which it is inserted,

Fig. 2 a plan view of the riveting device shown in Fig.1.

Fig. 3 is a cross s ection on the line III-III in Fig. 4 and Fig. 4 a partial section drawn to an enlarged scale of the whole device, the anvil with a rivet resting thereupon being shown in inoperative position,

Fig. 5 shows the same parts in operative posltion,

Figs. 6 and 7 are a plan and section respectively of a detail and Fig. 8 is a section of another form of construction of the sleeve illustrated in Fig. 1.

eferring to the drawings, 2 is a collar or socket clamped upon the end portion of the work piece 1 by means of a screw, or screws 3. In a bore of the socket 2 a rotatable body 4 is slidably arranged, said body being provided with a slot 5. A pin 6 mounted in the socket 2 and projecting into said slot permits only a longitudinal movement of the body 4 for the length of said slot. Within the body 4 there is provided a sleeve 7 which can be shifted in a longitudinal direction independently of inner wall of-the work piece.

said body, but which can also be rigidly fixed to thebody {1 by means of flanges 8 and screws (not shown), whereby the body 4 and the sleeve 7 can be moved only in common in a longitudinal direction, rotation being prevented altogether by the pin 6. In longitudinally displacing the sleeve 7 the member 9 rigidly connected to the sleeve 7 for instance by screws, is displaced as well. The flattened upper portion of member 9 carries a guide 10 adapted to receive a greater number of rivets. The member 9 is cut out rectangularly at its free end so as to make room for a wedge 11. It is further provided in its upper portion with a notch allowing the insertion of a fork-shaped part 12, embracing the wedge 11. A plate 13 inserted along with the part 12 orimmediately thereafter and a leaf spring 1%1 secured to said plate, are attached to the member 9 by means of the rivet guide or magazine 10, placed upon the body 9 after plate 13 with leaf spring 14 have been inserted. A threaded bolt 15, is screwed into the wedge 11, said bolt being surrounded by the sleeye 7 and connected therewith in such a manner, that it can be. rotated independently thereof by means of a crank 16 and a flange 16 rigidly connected thereto. however the crank and the bolt respectively being moved axially will cause to take place a longitudinal movement of the sleeve 7 and the body 9 secured thereto. On the crank being rotated the wedge 11 too will move in a longitudinal direction, this movement being limited in the one sense by a plate 9, secured to the body 9, while a movement of wedge 11 in the other sense will result in part 12 and a lever 17 being raised. Lever 17 being pivotally mounted on a pin 18 on part 12 is oscillated by striking the On lever 17 being oscillated it withdraws from the anvil 21 a leaf spring 20 with bifurcated ends and thereby releases the rivet embraced by said spring.

The operation of this device is as follows: The member 9 having been introduced in the interior of the work piece the socket 2 is clamped to the end of the latter. Thereupon a pin (not shown in the drawing) is inserted in a rivet hole and at the same time the member 9 is shifted in the direction of the longitudinal axis by means of the sleeve 7 and the bolt 15 and crank 17 v respectively, until said pin meets with the 23, passing through a bore of the socket,

pressure is now exerted on the row of rivets, arranged inthe rivet guide or magazine and the foremost rivet is thus shifted on to the On the other hand anvil 21, where it is guided by the spring 20,

holding the rivet shank in its bifurcated end and pressing its head down upon the anvil. In order to transport the rivet underneath the rivet hole, into which it is to be inserted, the body 4: is moved into the position shown in Fig. 1 and is thereupon rigidly clamped to the sleeve 7 in the manner before described. Now the pin is removed from the hole 22 and the whole device.with the exception of the socket 2, which remains clamped to the work pieceis shifted towards the left, until the solid portion of the body 4 at the end of slot 5 strikes the pin 6. As the length of the slot 5, after deducting the diameter of the pin, corresponds exactly to the distance between the center of the hole 22 and the axis of the rivet, the rivet resting on the anvil now stands exactly below the rivet hole into which it is to be inserted. By turning the crank 16 and thereby bolt 15 a little a longitudinal displacement of the wedge 11 is effected. In consequence thereof the member 12 and the rivet on the anvil are lifted and the rivet is inserted in the hole. The lever 17 pivotally mounted on the member 12 abuts against the inner wall of the work piece and by oscillating causes the spring 20 to oscillate also and thereby to release the rivet. At this moment the rivet is totally inserted in the rivet hole and its head is pressed flat against the inner wall of the work piece, so that the riveting can now be proceeded with as usual. After this has been accomplished the crank is turned backwards and in consequence thereof the wedge is returned into its initial position. The member 12 is caused to drop down by its own weight and by the pressure of the spring 14, secured to the plate 13, this latter being detachably connected to the member 9 in order to allow the insertion of the part 12. The lever17 returns to its normal position under the influence of the spring 19 and the leaf spring 20 again rests with its bifurcated end on the anvil. The whole operation is gone through again until all the rivets contained in the magazine have been disposed of.

scription, the safe insertion of the rivets in the rivet holes is insured independently of whether the distances between any two rivet holes are equal or not.

In the case of work pieces having their rivet holes equally distanced apart the sleeve 7 may be provided, according to Fig. 8, with holes 24, whose distance exactly corresponds I to the distance between the rivet holes. 6 projects through the slot into these holes. In this case it is no' more necessary to first carry the hole 22 and then the rivet itself below the rivet hole, but after a rivet has h been riveted, the sleeve 7 is merely ad- 30 As may be seen from the foregoingde- Pin , sleeve 7 and'rod 23 of point said abutment, means for'ca'rryl'ng said-abutvanced, until the pin 6 catches in the next following hole 24:. Now a fresh rivet is underneath the appropriate rivet hole.

Obviously the device can be employed for hollow work pieces of any desired length, it

being only necessary to employ a bolt 15,

only necessary the member 9. I a

I wish it to be understood that I do not desire to be limited to the exact details of to adapt thereto the form of construction shown and described, for obvious modifications W111 occur to a person skilled in the art.

I claim:

'1. In a device of the kind described in combination an abutment, adapted to be inserted in ahollow body, means for carrying said abutment opposite a predetermined of the inner wall of said body means for moving said abutment .in the direction towards said point.-

2. In a device of thekind described in combination an abutment adapted to be inserted in a hollow body, a wedge underneath ment and saidwedgeopposite a predetermined point' of the inner wall of said body and means for moving said wedge so as to cause said abutment to move in a direction towards said point. I

3. In a device ofthe-kind described in combination an'abutment, adapted to be inserted in ahollow body, arivet magazine near said abutment, means for carrying a plurality of rivets'in succession from said magazine to said abutment, a wedge-adapted to be reciprocated relatively to and to lift said abutment and means, for displacing said abutment, said wedgefand said magazine sufiicient length The workpiece may be of any section, it being and.

within said body the exact distance between two consecutive rivet holes. 1

combination, an abutment adapted to be inserted in a tube, means pro tube for axially displacing said-abutment,

distance between two consecutive rivet holes and means adapted to beoperated from out side for moving said abutment in the direction towards a rivet hole.

5. In a device of the combination, a bodyof a cross section approaching that of the tube to be riveted, an

abutment movable within an indenture' of ecting from said- 4:. In a device of the kind describedin v means 'for limiting said displacement to the. I

kind described said body, means adapted tobe operated.

from "outside for axially displacing said for limiting said axial displacement to thedistance between two consecutive rivet holes,

meansfor displacing said abutment trans- I versal of said body,a rivet magazine, means 75 for feeding rivets from said magazine in succession on to said abutment, means for holding a rivet on said abutment. and a lever" adapted to withdraw said holding means, as said versal.

In testimony whereof I aflix my signature.

7 1 HUGO JUN'KERS.

abutment is displaced'transv 8 0 to be riveted, an an indenture ofadapted to be operated 

